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sci.radiation-shielding-buildup Calculator
Calculates gamma radiation shielding thickness from the narrow-beam attenuation law and broad-beam formula including buildup factor B. Lead shielding for ⁶⁰Co (Eγ = 1.25 MeV): μ = 0.657 cm⁻¹, HVL = 1.05 cm — practical shielding design uses broad-beam formula with B to avoid underestimating dose.
Inputs
Mu Per Cm
Reference formula or conversion factor shown for context.
X Cm
Perpendicular measurement through the material. For insulation: thicker is better. For beams: directly affects bending resistance.
B Buildup
A multiplier applied in the calculation.
I0 Mgy H
Reference formula or conversion factor shown for context.
Results
transmitted intensity I (mGy/h)
Sample size or count used in the calculation.
attenuation factor I₀/I
A dimensionless multiplier applied in the calculation.
half-value layer HVL (cm)
The computed numeric or monetary value.
tenth-value layer TVL (cm)
The computed numeric or monetary value.
I = I₀·B·e^−μx
Reference formula or conversion factor shown for context.
buildup factor B
A dimensionless multiplier applied in the calculation.